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- Title
Pleural effusion detection system using wideband slot-loaded loop antenna.
- Authors
Ahdi Rezaeieh, S.; Abbosh, A. M.; Zamani, A.; Bialkowski, K.
- Abstract
Pleural effusion (PE) is the accumulation of fluids around the lungs due to various diseases, such as cancer, liver and heart failure. Given the fact that fluid provides a high contrast in terms of dielectric constant at microwave frequencies, a radar-based microwave imaging system is proposed to utilise that change in properties for the early detection of PE. The system uses a wideband slot-loaded loop antenna to scan the torso, a portable vector network analyser for signal generation and recording, and a laptop for signal processing and image formation using a frequency-based imaging algorithm. The utilised antenna is designed to have a compact size (in wavelengths) of 0.23 × 0.23 that is one-third the size of recent designs. By using proper slots in a conventional slot-loaded loop and adding a staircase-shaped patch to the loop's perimeter, the antenna achieves a fractional bandwidth of 50% (0.72-1.19 GHz), and a peak gain of 4.9 dBi. The practicality of the proposed system is successfully tested by detecting a small amount of fluid (3 mL) around the lungs of a realistic life-size torso phantom.
- Subjects
PLEURAL effusions; LOOP antennas; PERMITTIVITY; MICROWAVE imaging; WAVELENGTHS; COMPUTER algorithms; IMAGING phantoms
- Publication
Electronics Letters (Wiley-Blackwell), 2015, Vol 51, Issue 15, p1144
- ISSN
0013-5194
- Publication type
Article
- DOI
10.1049/el.2015.1652